Lead Halide Perovskites of Different...
Friday, Aug 25, 2017
4:00 pm - 5:00 pm
Three-dimensional (3D) lead halide perovskites exhibit impressively long carrier diffusion lengths and low trap densities, while reduced-dimensionality perovskites, such as two-dimensional (2D) and zero-dimensional (0D) perovskite derivatives, possess large exciton binding energies and high photoluminescence quantum yields. These characteristics make the diverse class of perovskite materials ideal for photovoltaics, photodetection, and light emission. The latest advances in growing and understanding the properties of monocyrstalline 3D perovskites, as well as 0D and 2D perovskite derivatives, will be discussed. The integration of these matrials will be demonstrated in a range of optoelectronic applications including: monocrystalline perovskite solar cells, simultaneously fast and sensitive photodetectors that can operate in both broadband and narrow-band regimes, and efficient light-emitting diodes. Thus, these device prototypes showcase the importance of crystallinity, dimensionality, and composition for tailoring materials properties, and realizing novel and efficient perovskite optoelectronics.
Dr. Osman M. Bakr